Update book.toml to include links to github

Author: Noam Yorav-Raphael

book.toml

@@ -1,12 +1,14 @@
 [book]
+title = "Nix Pills"
 authors = ["Luca Bruno"]
 language = "en"
 multilingual = false
 src = "pills"
-title = "Nix Pills"
 
 [output.html]
 additional-css = ["custom.css"]
+edit-url-template = "https://github.com/NixOS/nix-pills/tree/master/{path}"
+git-repository-url = "https://github.com/NixOS/nix-pills"
 
 [output.linkcheck]
 follow-web-links = true

pills/00-preface.md

@@ -1,7 +1,3 @@
----
-title: Nix Pills
----
-
 # Preface
 
 This is a ported version of the **Nix Pills**, a series of blog posts written by **Luca Bruno** (aka Lethalman) and originally published in 2014 and 2015. It provides a tutorial introduction into the Nix package manager and Nixpkgs package collection, in the form of short chapters called 'pills'.